Leveler bar for coke ovens

ABSTRACT

The invention concerns a leveler bar for coke ovens for levelling the coke debris cone forming below the filling holes in the furnace chamber during the filling process. The leveler bar comprises interconnected support elements which extend over the entire length of the oven chamber and are disposed parallel to one another at a distance dependent on the width of the oven chamber. According to the invention, the leveler bar comprises at least three support elements which are arranged parallel to one another, extend over the entire length of the oven chamber and are disposed relative to one another such that the leveler bar has a triangular cross-section. The two lower support elements are disposed at the same level and the upper support element is arranged centrally thereabove.

FIELD OF THE INVENTION

The invention concerns a leveller bar for coke ovens for levelling thecoke bulk charging cone forming below the charging holes of a coke ovenchamber during the coal charging process. The leveller bar comprisesinterconnected support elements which extend over the entire length ofthe oven chamber and which are arranged in parallel to one another at adistance dependent on the width of the oven chamber.

BACKGROUND OF THE INVENTION

DE 40 34 341 C2 describes a prior art leveller bar consisting ofvertical metal plates arranged in a longitudinal oven direction and inparallel to each other, with there being transverse coal entrainmentcarriers located at regular distances in the intermediate space confinedby the vertical plates.

Moving of leveller bars of this type into the oven chamber during thecoal charging process usually blocks the oven free space above the coalcharge by approx. 60% (see FIG. 1 attached hereto). This constraintfrequently involves clogging inside the oven free space by the end ofthe coal charging process and, associated therewith, serious emissionbecause the charging gases can no longer be discharged to the suctionpoint, i.e. to the standpipe or to the gas jumper pipe.

DE-A 10 58 018 describes a leveller bar for coke ovens. The part of thebar which is movable into the coke oven is provided with two side wingscomprising web-type connection elements arranged at certain distances.The two side wings are shaped like closed hollow girders with evenlyarched sheff plates. Clogging and emissions as a consequence thereof mayoccur because of the continuous lateral metal plates.

SUMMARY AND OBJECTS OF THE INVENTION

It is an object of this invention to propose a new design andconstruction for the coal leveller bar making it feasible to exhaust thecharging gases always, if possible, in an unrestricted manner.

According to the invention a coke oven leveller bar arrangement isprovided for levelling the coke bulk charging cone forming below acharging hole of a coke oven chamber during the coal charging process.The leveller bar is formed of interconnected support elements extendingover an entire length of the oven chamber and arranged in parallel toone another at a distance dependent on the width of the oven chamber.The leveller bar includes at least three supporting elements whichextend over an entire length of the oven chamber. The three supportingelements are arranged as an open trusswork-like construction. The opentrusswork-like construction has a triangular cross-section including twolower supporting elements arranged at the same level and an uppersupporting element located centrally there above.

The three supporting elements may preferably be provided to form anequilateral or isosceles cross-section of the leveller bar with avertical symmetrical plane. The supporting elements are preferablyinterconnected in a longitudinal direction at regular distances throughhorizontal lower transverse braces and/or through connecting bracespointing obliquely upward to the supporting element. The supportingbraces may be arranged diagonally between the lower supporting elementsand/or the upper supporting element, between two supporting braces each.The supporting elements and/or the braces may each be provided with aclosed cross-section. The supporting elements and braces may be providedwith the same and/or equally sized cross-section. All supportingelements and braces may consist substantially of commercial-type tubeswith a round or square cross-section.

The leveller bar which is the subject of this invention mainlyrepresents a trusswork girder of a triangular cross-section. This onlyblocks the oven free space during coal levelling by approximately 25%.Thus a clogging of the oven free space with coal is largely preventedand the charging gases evolving on coal charging can be dischargedunrestrictedly in the longitudinal oven direction to the relevant pointsof suction. Moreover, the trusswork-like design and constructioncomprised of transverse braces arranged at regular distances only and ofindividual, diagonally extending supporting braces also allow for alateral flow passage through the leveller bar, that means transverselyto the longitudinal oven direction.

The individual construction elements of the leveller bar expedientlyconsist of commercial-type tubes sized with diameters which are equal inall areas. In this way a low-cost and--because of the hollowcross-sections--relatively light-weight but nevertheless stableconstruction of the leveller bar is achieved.

The invention is more closely explained by way of FIGS. 1 to 4 attachedhereto serving as examples.

The various features of novelty which characterize the invention arepointed out with particularity in the claims annexed to and forming apart of this disclosure. For a better understanding of the invention,its operating advantages and specific objects attained by its uses,reference is made to the accompanying drawings and descriptive matter inwhich preferred embodiments of the invention are illustrated.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings:

FIG. 1 is a cross-sectional view showing a prior art leveller bararrangement;

FIG. 2 is a cross-sectional view similar to FIG. 1 showing the levellerbar being the subject of this invention with the triangular, equilateralcross-section;

FIG. 3 in a longitudinal section shows the arrangement of the levellerbar in the oven free space of a coke oven chamber; and,

FIG. 4 in a magnified top view shows a typical leveller bar segment.

DESCRIPTION OF FIG. 1

FIG. 1 in a cross-section shows the arrangement of a leveller bar 9built to the state of the art, located in an oven free space 4 confinedby the lateral coking chamber walls 1, the top edge 3, the coal charge 2in the chamber, and by the oven chamber ceiling 16. The leveller barbuilt to the state of the art mainly consists of two vertical metalplates arranged in parallel to each other and interconnected with eachother. During coal levelling this leveller bar occupies approx. 57% ofthe cross-section of the entire oven free space 4.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to the drawings in particular, the invention as shown in FIGS.2, 3 and 4 comprises a leveller bar arrangement. The leveller baraccording to the invention comprises two lower supporting elements 11which are arranged at the same level and are arranged in parallel toeach other. These supporting elements 11 are interconnected at regulardistances through horizontally arranged transverse braces 13. Arrangedcentrally above the transverse brace 13, there is provided an uppersupporting element 12. The upper supporting element 12 is connected withthe two lower supporting elements 11 through the connecting braces 14.For stabilization, as shown in FIG. 4, the two lower supporting elements11 (FIG. 3 shows each of the lower supporting elements 11) are connectedto the upper supporting element 12 is connected with the diagonallyextending supporting brace 15. Each supporting brace 15 is affixed atconnection points of the supporting elements 11 with the transversebraces 13 and/or affixed at the upper supporting elements 12 with theconnecting braces 14.

FIG. 3 also illustrates the top of the oven 5, the charging holes 6, thestandpipe 8 and the coke oven door 7. A leveller door opening is locatedin the upper area of the coke oven door 7 on the pusher side. Throughthis leveller door opening the leveller bar 10 can be moved inhorizontally and longitudinal directions into the oven free space floorfor the coal levelling process.

While specific embodiments of the invention have been shown anddescribed in detail to illustrate the application of the principles ofthe invention, it will be understood that the invention may be embodiedotherwise without departing from such principles.

I claim:
 1. A coke oven leveller bar for levelling a coke bulk chargingcone forming below a charging hole of a coke oven chamber during a coalcharging process, comprising:interconnected supporting elementsextending over an entire length of the oven chamber, said interconnectedsupporting elements being arranged in parallel to one another at adistance based on the width of the oven chamber, said supportingelements being provided as three supporting elements extending over anentire length of the oven chamber arranged as an open trusswork-likeconstruction to provide a triangular cross-section with two lowersupporting elements being arranged at a same level and with an uppersupporting element being located substantially centrally thereabove. 2.A leveller bar according to claim 1, wherein said three supportingelements form one of an equilateral or isosceles cross-section to form aleveller bar with a vertical symmetrical plane.
 3. A leveller baraccording to claim 1, wherein said supporting elements areinterconnected in longitudinal direction at regular distances by one ofhorizontal lower transverse braces and/or through connecting bracespointing obliquely upward to said upper supporting element.
 4. Aleveller device according to claim 1, further comprising diagonallyarranged supporting braces extending between one of said lowersupporting elements and between said upper supporting element and one ofsaid lower supporting elements, said diagonally arranged supportingbrace being disposed between two supporting braces.
 5. A leveller baraccording to claim 1, wherein said supporting elements are each providedwith a closed cross-section.
 6. A leveller bar according to claim 4,wherein at least one of said braces and said diagonally arrangedsupporting brace is provided with a closed cross-section.
 7. A levellerbar according to claim 6, wherein each of said supporting elements andsaid braces is provided with a same and/or equally sized cross-section.8. A leveller bar according to claim 6, wherein each of said supportingelements and braces consist of commercial-type tubes with rounded orsquare cross-section.
 9. A coke oven leveller bar arrangement,comprising:a coke oven defining a coke oven chamber with a charging holeforming a charging cone below said charging hole, during a coal chargingprocess; and a leveller bar including a plurality of supporting elementsextending over an entire length of said oven chamber, said supportingelements being arranged in parallel to one another spaced a distanceproportional to a width of said oven chamber, said supporting elementsbeing arranged as an open trusswork-like construction having atriangular cross-section including two lower supporting elementsarranged at a same level and an upper supporting element locatedsubstantially centrally above said lower supporting elements.
 10. Aleveller bar arrangement according to claim 9, wherein said lowersupporting elements and said upper supporting element form one of anequilateral and isosceles cross-section with a vertical symetricalplane.
 11. A leveller bar arrangement according to claim 9, furthercomprising horizontal lower transverse braces interconnecting said lowersupport elements in a longitudinal direction, said transverse brace isbeing provided at regular distances.
 12. A leveller bar arrangementaccording to claim 9, further comprising connecting braces connectingeach lower supporting element to said upper supporting element, saidconnecting braces pointing obliquely upward.
 13. A leveller deviceaccording to claim 11, further comprising diagonal supporting bracesarranged diagonally between each lower supporting element and said uppersupporting element, between two said connecting braces.
 14. A levellerdevice according to claim 12, further comprising diagonal supportingbraces arranged diagonally between each lower supporting element andsaid upper supporting element, between two said transverse braces. 15.The leveller arrangement according to claim 14, wherein at least one ofsaid supporting elements and said braces is provided with a closedcross-section.
 16. A leveller bar according to claim 15, wherein each ofsaid supporting elements and said braces are provided with the sameand/or equally sized cross-section.
 17. A leveller bar according toclaim 16, wherein each of said supporting elements and said bracesconsist of commercial-type tubes with one of a round and squarecross-section.